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Technical Briefs

Solar Radiation on Horizontal Tubular Microalgae Photobioreactor: Direct Beam Radiation

[+] Author and Article Information
T. Maor, J. Appelbaum

Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israelappel@eng.tau.ac.il

J. Sol. Energy Eng 133(2), 024502 (Mar 23, 2011) (5 pages) doi:10.1115/1.4003585 History: Received April 26, 2010; Revised January 18, 2011; Published March 23, 2011; Online March 23, 2011

The solar irradiation on a photobioreactor plant for cultivating microalgae products such as dyes, vitamin, and biofuel is formulated, calculated, and verified. The outdoor solar plant consists of multiple horizontal tubes arranged in multiple vertical walls. The solar irradiation determines the growth rate of the algae; therefore, calculating the amount of solar radiation on the plant is important to estimate the production of microalgae. The incident direct beam irradiation on the tubes is calculated, taking into account tube and wall shading.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 2

Possible shading on a wall over the course of a day

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Figure 3

Conditional and full shading

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Figure 4

Cross section of two neighboring tubes

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Figure 5

Angle μ between the solar ray and the normal to the effective area

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Figure 6

The effect of the distance between tubes on the annual incident direct beam energy, ϕ=32 deg (Tel Aviv), oriented north-south

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Figure 7

The effect of the distance between walls on the annual incident direct beam energy, ϕ=32 deg (Tel Aviv)

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Figure 8

Variation in daily incident direct beam energy on the bioreactor, ϕ=32 deg (Tel Aviv), oriented north-south

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Figure 9

Variation in daily incident direct beam energy on the bioreactor, ϕ=32 deg (Tel Aviv), oriented east-west

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Figure 10

Verification of the model for direct beam radiation

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